- ICH GCP
- Реестр клинических исследований США
- Клиническое испытание NCT07625735
MMR Status Modulates the Predictive Value of Lymphatic Invasion for Lymph Node Metastasis in Gastric Cancer
Mismatch Repair (MMR) Status Modulates the Predictive Value of Lymphatic Invasion for Lymph Node Metastasis in Gastric Cancer
Brief Summary
Lymph node metastasis (LNM) is a key factor influencing treatment decisions and prognosis in patients with gastric cancer. Lymphatic invasion (LI) is an important pathological predictor of LNM and a core component of the eCURA risk scoring system after endoscopic submucosal dissection (ESD) for early gastric cancer. However, whether LI has the same predictive value for LNM across different mismatch repair (MMR) statuses remains unclear. Compared with proficient mismatch repair (pMMR) gastric cancer, deficient mismatch repair (dMMR) gastric cancer has distinct molecular pathological features and an immune-enriched tumor microenvironment. In early gastric cancer, if LI is associated with a lower LNM risk in dMMR tumors than in pMMR tumors, existing LI-based eCURA risk assessment may overestimate LNM risk in patients with dMMR early gastric cancer and consequently affect decisions regarding additional surgery after ESD. Therefore, this study aims to systematically evaluate the impact of MMR status on the association between LI and LNM using upfront-surgery and post-ESD additional-surgery cohorts from our center, and to explore the potential clinical value of MMR status in refining eCURA-based risk stratification for early gastric cancer.
Обзор исследования
Статус
Условия
Вмешательство/лечение
Тип исследования
Регистрация (Оцененный)
Контакты и местонахождение
Контакты исследования
- Имя: Zhaoqing Tang
- Номер телефона: 86-021-64041990
- Электронная почта: tang.zhaoqing@zs-hospital.sh.cn
Критерии участия
Критерии приемлемости
Возраст, подходящий для обучения
- Взрослый
- Пожилой взрослый
Принимает здоровых добровольцев
Метод выборки
Исследуемая популяция
Описание
Inclusion Criteria:
Upfront surgery cohort
- Patients who underwent radical surgery for gastric cancer at Zhongshan Hospital, Fudan University.
- Patients who did not receive neoadjuvant chemotherapy, radiotherapy, immunotherapy, or other antitumor treatments that may affect the pathological assessment of the primary tumor or lymph node metastasis before surgery.
- Patients with pathologically confirmed gastric adenocarcinoma or gastroesophageal junction adenocarcinoma after surgery, including Siewert type II and III tumors only.
- Patients with definite pathological assessment of lymphatic invasion and regional lymph node status.
- Patients with available and definite MMR status.
ESD cohort
- Patients who underwent ESD for gastric cancer at Zhongshan Hospital, Fudan University.
- Patients with pathologically confirmed gastric adenocarcinoma or gastroesophageal junction adenocarcinoma after ESD, including Siewert type II and III tumors only.
- Patients with complete post-ESD pathological information, including histological type, depth of invasion, tumor size, ulcerative findings, lymphatic invasion status, venous invasion status, horizontal margin status, and vertical margin status.
- Patients with available and definite MMR status.
Exclusion Criteria:
Upfront surgery cohort
- Patients with other pathological types, such as gastric squamous cell carcinoma or neuroendocrine carcinoma.
- Patients who received neoadjuvant treatment before surgery, including chemotherapy, radiotherapy, immunotherapy, targeted therapy, or other systemic antitumor treatments.
- Patients with missing postoperative pathological information, resulting in inability to determine lymphatic invasion or regional lymph node metastasis status.
- Patients with missing or indeterminate MMR status.
- Patients with concurrent malignancies that may interfere with the determination of the origin of lymph node metastasis.
ESD cohort
- Patients with other pathological types, such as gastric squamous cell carcinoma or neuroendocrine carcinoma.
- Patients with missing post-ESD pathological information that precludes eCURA classification, eCURA risk score calculation, or assessment of lymphatic invasion status.
- Patients with missing or indeterminate MMR status.
Учебный план
Как устроено исследование?
Детали дизайна
Когорты и вмешательства
Группа / когорта |
Вмешательство/лечение |
|---|---|
|
dMMR gastric cancer
Patients with gastric cancer classified as deficient mismatch repair (dMMR) based on routine pathological testing.
|
Mismatch repair (MMR) status was assessed as part of routine pathological evaluation.
Patients were classified as deficient mismatch repair (dMMR) or proficient mismatch repair (pMMR) according to immunohistochemical expression of MLH1, PMS2, MSH2, and MSH6.
Lymphatic invasion status was determined from routine pathological reports and classified as LI-positive or LI-negative.
|
|
pMMR gastric cancer
Patients with gastric cancer classified as proficient mismatch repair (pMMR) based on routine pathological assessment.
|
Mismatch repair (MMR) status was assessed as part of routine pathological evaluation.
Patients were classified as deficient mismatch repair (dMMR) or proficient mismatch repair (pMMR) according to immunohistochemical expression of MLH1, PMS2, MSH2, and MSH6.
Lymphatic invasion status was determined from routine pathological reports and classified as LI-positive or LI-negative.
|
Что измеряет исследование?
Первичные показатели результатов
Мера результата |
Мера Описание |
Временное ограничение |
|---|---|---|
|
Lymph Node Metastasis Rate Among LI-Positive Gastric Cancer Patients
Временное ограничение: At postoperative pathological assessment, approximately 14 days after upfront surgery
|
LI positivity is defined as lymphatic invasion explicitly documented in the pathological report or tumor emboli within lymphatic vessels confirmed by D2-40 immunohistochemistry. LNM is defined as regional lymph node metastasis confirmed by postoperative pathological examination.
The LNM rate among LI-positive patients is calculated as the number of patients with LNM divided by the total number of LI-positive patients in the corresponding group.
|
At postoperative pathological assessment, approximately 14 days after upfront surgery
|
Вторичные показатели результатов
Мера результата |
Мера Описание |
Временное ограничение |
|---|---|---|
|
LI Positivity Rate According to MMR Status
Временное ограничение: At postoperative pathological assessment, approximately 14 days after upfront surgery
|
This outcome evaluates differences in LI positivity rate between patients with dMMR and pMMR gastric cancer.
LI positivity rate is calculated as the number of LI-positive patients divided by the total number of patients in each MMR group.
|
At postoperative pathological assessment, approximately 14 days after upfront surgery
|
|
Overall LNM Rate According to MMR Status
Временное ограничение: At postoperative pathological assessment, approximately 14 days after upfront surgery
|
This outcome evaluates differences in overall LNM rate between patients with dMMR and pMMR gastric cancer.
Overall LNM rate is calculated as the number of patients with pathologically confirmed LNM divided by the total number of patients in each MMR group.
|
At postoperative pathological assessment, approximately 14 days after upfront surgery
|
|
eCURA Risk Stratification and LI Contribution in the Gastric Cancer ESD Cohort
Временное ограничение: At pathological assessment of the ESD specimen, approximately 14 days after ESD
|
This outcome evaluates differences in eCURA classification, eCURA risk score distribution, and the contribution of LI to the risk score between dMMR and pMMR patients in the gastric cancer ESD cohort.
LI contribution is assessed based on its role in eCURA-C2 classification and/or its component score contribution within the eCURA risk scoring system.
|
At pathological assessment of the ESD specimen, approximately 14 days after ESD
|
|
LNM Rate Among LI-Positive Patients in the cohort undergoing additional gastrectomy after ESD
Временное ограничение: At postoperative pathological assessment, approximately 14 days after additional surgery
|
This outcome evaluates differences in LNM risk between LI-positive dMMR and pMMR patients with early gastric cancer who underwent additional surgery after ESD.
LNM is defined as regional lymph node metastasis confirmed by pathological examination of the additional surgical specimen.
LNM rate is calculated as the number of patients with LNM divided by the total number of LI-positive patients in each MMR group.
|
At postoperative pathological assessment, approximately 14 days after additional surgery
|
Соавторы и исследователи
Спонсор
Даты записи исследования
Изучение основных дат
Начало исследования (Оцененный)
Первичное завершение (Оцененный)
Завершение исследования (Оцененный)
Даты регистрации исследования
Первый отправленный
Впервые представлено, что соответствует критериям контроля качества
Первый опубликованный (Действительный)
Обновления учебных записей
Последнее опубликованное обновление (Действительный)
Последнее отправленное обновление, отвечающее критериям контроля качества
Последняя проверка
Дополнительная информация
Термины, связанные с этим исследованием
Дополнительные соответствующие термины MeSH
Другие идентификационные номера исследования
- B2026-354
Планирование данных отдельных участников (IPD)
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Информация о лекарствах и устройствах, исследовательские документы
Изучает лекарственный продукт, регулируемый FDA США.
Изучает продукт устройства, регулируемый Управлением по санитарному надзору за качеством пищевых продуктов и медикаментов США.
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